Flex-O-Vent is our most economical polyester-based ventilation product. Available in 10-foot and 20-foot rolls and multiple packaging options, Flex-O-Vent won’t absorb moisture, which can freeze and block all ventilation. It features M63 Marco proprietary adhesive for superior hold, easy one-person installation and a 40-year limited warranty.
This vent keeps your system performing at its best by promoting efficient airflow to reduce lint buildup and excess heat, helping prevent moisture damage inside the home. Its enclosed design works to keep out insects, critters, and rain, while the removable cap makes cleaning and maintenance simple and fast. With leak-prevention features built into the design, it helps reduce customer call-backs and gives installers a dependable solution they can trust on every shingle roof application.
Overall
Net Free Area: 23 sq. in. for 1” free-standing product*
1- 1/2” x 3” x 10’: Rib heights up to 1-1/4”
1- 1/2” x 2” x 10’: Rib heights up to 1-1/4”
1” x 3” x 10’: Rib heights up to 3/4”
1” x 2” x 10’: Rib heights up to 3/4”
Air Permeability: >760 cubic feet per minute
Cold Cracking: -55˚C (-130˚F)
Tear Strength: 3.5 ppi
Tensile Strength: 16 psi – Elongation 175%
Compressive Strength: 1.8 psi at 75%
Abrasion: No Damage
*Effective Net Free Area varies based on product height, panel profile, and installation methods.
With Flex-O-Vent, one size fits most panels. Installation is a simple two-step process easily handled by one installer. Flex-O-Vent comes in easy-to-handle 10-foot rolls (mirroring most ridge cap lengths) or larger 20-foot rolls if you prefer. It is easily cut with scissors or a utility knife, and a double bead of M63 adhesive holds Flex-O-Vent securely in place until the ridge cap is installed.
Calculate the exact amount of ventilation needed for a well-balanced system.
